Two independent circuits Shell & tube heat exchanger Selection of pumping assembly with low or high head Air-cooled water chillers with axial fans NECS_0202T_0612T_200912_GB r HFC R-410A (The photo of the unit is indicative and may change depending on the model) Climaveneta Technical Bulletin 0202T - 0612T 53 - 159 kW NECS
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Two independent circuitsShell & tube heat exchangerSelection of pumping assembly with low or high head
Air-cooled water chillers with axial fans
NECS_0202T_0612T_200912_GB
r HFCR-410A
(The photo of the unit is indicative and may change depending on the model)
Climaveneta Technical Bulletin
0202T - 0612T53 - 159 kW
NECS
II NECS_0202T_0612T_200912_GB
NECS
HFC R410A
SUMMARYNECS
0202T - 0612T
Liability disclaimerThis bulletin is not exhaustive about: installation, use, safety precautions, handling and transport. Refer to “General Manual for Installation” for further informations.This bulletin refers to standard executions, in particular for di-mension, weight, electric, hydraulic, aeraulic and refrigerant connections (whereas applicable). Contact Climaveneta Com-mercial Offi ce for further drawings and schemes.
Climaveneta declines any liability derived from the bulletin’s use. This bulletin is of exclusive property of Climaveneta, and all forms of copy are prohibited. The information contained in this document may be modifi ed without prior notice.
Company quality system certifi ed to UNI EN ISO 9001
1. Product presentation 1.1 Maximum reliability 1.2 Effi ciency 1.3 Hydronic unit 1.4 Demand limit 1.5 Low noise versions 1.6 Energy indices IPLV and ESEER
2. Unit description 2.1 Standard unit composition 2.2 Controller 2.3 Reference standards 2.4 Unit’s test 2.5 Available versions 2.6 Accessories
3. Electronic controller4. Technical data
4.1 General technical data 4.2 Cooling capacity performance
5. Operating range6. Hydraulic data
6.1 Water fl ow and pressure drop7. Hydronic groups (Optional)8. Electrical data9. Full load sound level10. Dimensional drawings11. Key to hydraulic connections
This section contains general information on the NECS range of products. For detailed information refer to the specifi c sec-tions in this bulletin.
NECS unitsNECS 0202T-0612T is a range of air-cooled liquid chillers, scroll type rotary compressors with R410A operating on two separate and independent circuits, and a shell & tube heat exchanger.This new NECS series has been designed to satisfy specifi c application requirements where it is necessary to ensure conti-nuous operation.
1.1 Maximum reliabilityUnit with dual-circuit chilling section designed to ensure ma-ximum effi ciency at full load, ensuring continuity without inter-ruption of operation in the event of breakage of one of the 2 circuits.
1.2 Effi ciencyCondensation control with continuous adjustment of the fan speed by means of a phase-cut device for the supply voltage.This allows the optimisation of energy consumption, adaption condensation to any environmental condition, while at the same time guaranteeing the minimum noise level of the ventilation assembly.
1.3 Hydronic unitThe integrated hydronic assembly includes the main hydraulic components, with a low- or high-head pump. Shut-off valves upstream and downstream from each pump to facilitate repla-cement operations without having to drain the hydraulic system. Automatic pump rotation system in the event of a breakdown without interrupting operation (only in units with a dual pump).
1.4 Demand limitDigital input allowing activation of the function that limits the maximum power supplied by the unit to a predetermined va-lue.The function may be used as a load protection system or as an energy saving function.
1.5 Low noise versionsTwo noise reduction versions are available for all sizes: low noise (LN) and super low noise (SL). Low noise levels are achieved by reducing fan speed while the circuitry has been optimised and the coils generously sized to ensure the unit works correctly.
1. PRODUCT PRESENTATION1.6 Energy indices IPLV and ESEERIncreasingly closer attention is being paid towards the power consumption of air-conditioning equipment, both in Europe and elsewhere.For many years in the United States, reference has not just been made to effi ciency at rated conditions. A valuation index is used which considers marginal operation of the unit at rated conditions as well as the increased usage when the separation stages of the cooling compressors are used.
The valuation index adopted in the United States is called IPLV (Integrated Part Load Value) and is defi ned in the regulations issued by ARI (American Refrigeration Institute).
ARI Standard IPLVARI =(1*EER100% + 42*EER 75% + 45*EER50% + 12*EER25%) /100
Where EER100%, EER75%, EER50%, EER25% are the effi ciencies of the chiller in the various load conditions (100% - 75% - 50% and 25% respectively), calculated in the external air temperature conditions shown below. The temperature of the water leaving the evaporator is considered constant at 6.7°C in all load condi-tions, with a delta of 5°C in the full load condition.The multipliers 1, 42, 45 e 12 are the cooling performance coef-fi cients in various load conditions statistically calculated by ARI on the basis of surveys conducted, for various types of build-ings and operating conditions, in 29 American cities.
Evaporator temp. leaving 7°C constantDeltaT full load 5°CLoad 100% 75% 50% 25%Cond. water temp. 35°C 30°C 25°C 20°C
IV NECS_0202T_0612T_200912_GB
NECS
HFC R410A
After establishing which index to use and estimating the total power required by the system in the summer mode (in kWh), we can calculate seasonal electricity consumption (in kWh) us-ing the following formula:
Power absorbed = Power requested / Index of effi ciency
The real power calculation can be obtained more correctly in a “dynamic” form, that is, considering the load performance
curve at different external temperatures, the location and the reference number of operating hours.These fi gures will allow plant consultants and designers to make their evaluations depending on the type of building, the place of installation and the type of heat load. etc.. They can also determine the energy index using the method that best re-fl ects plant requirements and can make comparisons between similar or equivalent systems using the same reference unit.
SIZE VERSION ESEER
0202
B 3.72
LN 3.50
HT 4.07
SL 3.13
0252
B 3.47
LN 3.51
HT 3.81
SL 3.19
0302
B 3.52
LN 3.37
HT 3.93
SL 3.00
0352
B 3.49
LN 3.22
HT 3.76
SL 3.25
0412
B 3.41
HT 3.33
LN 3.87
SL 3.30
0452
B 3.59
HT 3.36
LN 3.76
SL 3.14
0512
B 3.65
HT 3.38
LN 3.86
SL 3.14
0552B 3.66
LN 3.34
0612B 3.44
LN 3.11
Weight= quantity of energy produced in the respective load conditions
External air temperature (°C) External air temperature (°C)
Load
- W
eight
Coef
fici
ent
(%
)
Load Air Temp. Weight CoefficientAir Temp. Weight Coefficient
100%
50%
75%
25%
35°C
25°C
30°C
20°C
3%
41%
33%
23%
35°C
18,3°C
26,7°C
12,8°C
1%
45%
42%
12%
Load
Weight Coefficient
Load
Weight Coefficient
1 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
NECS. State of the art system NECS is a new series of water chillers which are ideal for low-to-medium power air-conditioning systems and particularly suit-able for installations with a limited water content. NECS is a step beyond other systems thanks to its exclusive QuickMind control system, specifi cally developed by Climaveneta. Thanks to the innovative QuickMind control, the NECS system has been designed to work on plants with a low water content where, unlike traditional controls, it minimises the variations in inlet water temperature even in extremely variable load condi-tions. It is a highly professional alternative to the installation of storage tanks.NECS assures a precise water temperature control even at just 2.5 litres/kW. Technical start-up and operating times have been reduced. During the start-up phase, just the temperature set point needs setting.The possibility integration of the hydronic-pump-group inside the unit simplifi es the water and electrical power circuits of the system.QuickMind continuously adapts its system settings to the vari-ous requirements of the plant.
Air-cooled water chillers Outdoor unit for the production of chilled water with dedicated hermetic rotary scroll compressors for the use of R410A, axial fans, condensation coil with copper pipes and aluminium fi ns, shell & tube exchanger and thermostatic expansion valve. Ex-ternal panelling in peraluman and structure of aluminium sec-tions. The range comprises units equipped with two compres-sors on two circuits. 2.1 Standard unit composition
StructureSpecifi c structure for outdoor installation, made with a hot-gal-vanised sheet steel base of adequate thickness, painted with polyester powders, perimeter structure composed of aluminium sections.
PanellingSpecifi c panelling for outdoor installation in aluminium alloy which ensures total resistance to atmospheric agents, easily removable, made in such a way as to allow total access to the internal components to facilitate inspection and maintenance work.
CompressorsHermetic scroll compressors complete with an oil sump heater, electronic overheating protection with centralised manual reset and a two-pole electric motor.
Plant-side heat exchangerDirect expansion shell & tube exchanger, with asymmetrical refrigerant side fl ows for maintaining the correct speed of the refrigerant in the tubes when passing from the liquid to the gas phase. Steel shell with foamed closed-cell elastomer anti-con-densation lining. The shell & tube is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates.
Source heat exchanger Finned coil exchanger made by copper tubes mechanically bounded to aluminium fi ns. The aluminium fi ns are correctly spaced to guarantee optimum heat exchange effi ciency.
FansAxial electric fans, with IP 54 protection class, with external rotor and plastic-coated aluminium blades. Housed in aerodynamic hoods complete with safety grille. 6 - pole electric motor with built-in thermal protection. The fan chamber is divided into two sections for the independent management of defrosting cycles in the two circuits (only models with heat pump). Condensation control by means of a device for continuous adjustment of the fan rotation speed.
Pumps (where present)Horizontal one-piece centrifugal pump with one impeller, axial suction and radial delivery, DIN GG20 cast iron body and AISI 316L stainless steel or cast iron impeller. The section of the shaft in contact with the liquid is made by stainless steel. Me-chanical seal with components in ceramics, carbon and NBR elastomers. Three-phase electric motor with IP55 protection class, insulation class F, suitable for continuous service. Shut-off valves upstream and downstream from each pump to facili-tate replacement operations without having to drain the hydrau-lic system. Automatic pump rotation system in the event of a breakdown without interrupting operation (only in units with a dual pump).
2. UNIT DESCRIPTION
2 NECS_0202T_0612T_200912_GB
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HFC R410A
2.2 ControllerElectronic controls fi tted on board the unit and provided with an operator panel to allow navigation of the programming and diagnostics menus. Access to the machine functions ensured at different levels by a protection password for the User (ma-chine functions) and another password for the Service Cen-tres (advanced functions and diagnostic services). IP65 front panel protection class. Compressor regulating algorithms of the proportional, proportional/integral or QuickMind type in the dead area with self-adapting logic to reduce the amount of water in the system. Integrated compressor rotation logic based on operating hours.Control logic with functions of:
optimisation of system running on full power• minimising discharge line temperature oscillations com-• pared with the set point.Choice of regulating parameters, based both on the system • return temperature and on the delivery temperature.optimisation of compressor activation in the presence of re-• duced loads.detecting and reporting a large series of events such as: • insuffi cient water content in the plant; low/high water fl ow in the plant; low/high inlet water temperature; pump and compressor maintenance times; refrigerant circuit integrity alarm.
Condensation control with continuous adjustment of the fan speed by means of a phase-cut device for the supply voltage based on the condensation pressure detected by dedicated pressure transducers. Voltage-free digital input for remote switching off and on of the unit.Set-up for installing remote operator panel. Set-up for con-necting to supervision systems using ModBus, Bacnet and Echelon LonTalkprotocols. Set-up for multilingual local and/or remote keyboard for remote control of the unit, Demand Limit input for limiting the supplied power, and 4..20mA analogue input for varying the working set-point of the unit.
2.3 Reference standardsThe machine complies with the following directives and their amendments:• 2006/42/CE Machinery Directive.• E.C.D. 89/336/EEC + 2004/108/EC.• 2006/95/EC Low Voltage Directive.• 97/23/EC Pressure Equipment Directive . Module A1. TÜV-Italia 0948
2.4 Unit’s test Tests carried out along the all productive process as imposed by ISO9001. Possibility to have performance and acou-stical witness tests, with the support of qualifi ed technical operators. Performance tests give the possibility to measure:- electric data, - waterfl ows, - operating temperature, - absorbed and given power, both at full load and partial load condition. It’s even possible to have a simulation of the most common alarm states and the pressure drops (water side) measu-rements. The acoustical tests allow to verify level of sound emissions of the unit according to ISO3744.
2.5 Available versionsB-BaseStandard model.
HT- High temperaturesThis confi guration features special soundproofi ng for the compressor chamber, reduced fan speed, an oversized con-densing section. Fan speed is automatically increased if en-vironmental conditions are particularly tough.
LN- Low noise Low noise version. This confi guration features special sound-proofi ng for the compressor chamber and reduced fan speed. Fan speed is automatically increased if environmental condi-tions are particularly tough.
SL- Super low noiseSuper low noise version. This confi guration features special soundproofi ng for the compressor chamber, reduced fan speed, an oversized condensing section. Fan speed is au-tomatically increased if environmental conditions are particu-larly tough.
3 NECS_0202T_0612T_200912_GB
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HFC R410A
2.6 Accessories- Remote phase-sequence control
Relay for controlling the phase-sequence of mains. Protects loads against faults due to incorrect connection of the electric line.
- Compressors’ on/off signalAuxiliary contacts providing a voltage-free signal. Allows remote signalling of compressor’s activation or remote control of any auxiliary loads.
- ModBUS connectivityInterface module for ModBUS protocols Allows integration with BMS operating with ModBUS proto-col.
- BACnet connectivityInterface module for BACnet protocols. Allows integration with BMS operating with BACnet protocol.
- Echelon connectivityInterface module for Echelon systems. Allows integration with BMS operating with LonWorks pro-cotls.
- Aux 4-20mA remote D L.C.4..20mA analogue input, voltage-free digitale input. Allows to change the operating set-point according to value of current applied to 4..20mA input and to limit the unit’s power (by acti-vating the digital input). Enforce Energy Saving policy, ensure safety operation.
- HP and LP gaugesHigh and low pressure gauges. Allows immediate reading of the pressure values on both low and high pressure circuits.
- Compressor suction valveShut-off solenoid valve on compressor’s suction circuit. Simplifi es maintenance activities.
- Compressors. discharge line valveShut-off solenoid valve on compressor discharge circuit. Simplifi es maintenance activities.
- Condensing coils with epoxy-coated fi nsPainted air-refrigerant heat exchanger. Recommended for applications in medium level pollution at-mospheres.
- Cu/Cu condensing coilsAir-refrigerant heat exchanger with copper fi ns and tubes. Recommended for applications in corrosive atmospheres.
- Condensing coils with Fin Guard Silver treatmentAir-refrigerant heat exchanger with epoxidic treatment on coils and fi ns. Recommended for marine exposure conditions, with an high level of pollution or other aggressive atmospheres.
- Condensing coil protection netCoil protecting net. Protects against the intrusion of solid bodies with medium-large dimensions.
- Var. fan speed low amb. control (standard on SL units)Acoustic encolsure on both compressor and pump sections (when applicable).Noise emission reduction.
- W3000 compact visual displayLCD display keyboard type W3000 Compact.Easy of use, multi-language user interface, remote unit’s con-trol.
- Prearrangement for remoteLCD display keyboard type W3000 Compact.Easy of use, multi-language user interface, remote unit’s con-trol.
- Hydronic kit with one low-head pumpSee dedicated section.Simplifi es installation.
- Hydronic kit with two low-head pumps See dedicated section.Simplifi es installation, allows operating safety.
- Hydronic kit with one high-head pumpSee dedicated section.Simplifi es installation.
- Hydronic kit with two high-head pumpsSee dedicated section.Simplifi es installation, allows operating safety.
- Soft startElectronic device adopted to manage the inrush current. Break down of the inrush current as soon as the electrical mo-tor is switch on, lower motor’s mechanical wear, favourable sizing for the electrical system.
- Remote keyboardRemote operator panel (see dedicated section).Allows programming and display of machine status in remote mode.
- Remote signal double SPAllows to activate the Energy Saving set-point.Enforce Energy Saving policy.
- Multi-units control devices (sequencer, Manager3000, FWS3000). Separately supplied
- Multilingual user interface (only with W3000 COMPACT key-boardSpecial control unit programming (see dedicated section).Interface in English, French, German, Spanish and Swedish.
4 NECS_0202T_0612T_200912_GB
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HFC R410A
Control unit with LCD display (standard)The new “W3000 Base” control unit is installed on all units.
Main functions: QuickMind, local and remote FWS supervi-sion, dual setpoint management, etc., confi rm Climaveneta’s commitment to continually developing its electronics technol-ogy. The heat pumps, moreover, are fi tted with the original Cli-maveneta defrosting control system called “Autotuning Defrost” which considerably reduces defrosting times, thus improving the energy performance of the unit. Interfaces with BMS sys-tems: METASYS®, MODBUS®, LONWORKS®, SIEMENS®, TREND®.
Black Box logs data relative to 200 alarm events which can be printed with a personal computer.
QuickMind is a special control unit which monitors the main op-erating parameters, predicts system behaviour and anticipates unit settings in order to constantly optimise performance; it al-lows both return and delivery water temperatures to be chosen as adjustment parameters. It can reduce outlet temperature fl uctuations even with a small amount of water in the system. When, for dual-compressor chillers featuring a maximum of 12 start-ups per hour and using a traditional adjustment system, the minimum recommended water content is 5.5 l/kW, Quick-Mind ensures the same chiller operates correctly even with a water content of just 2.5 l/kW and considerably reduces outlet temperature fl uctuations. The following graph shows that outlet temperature fl uctuations with QuickMind are limited to 4.3 °C as opposed to 7.45 °C if the traditional adjustment system were used, without even ensuring an acceptable minimum compres-sor start time.
3. ELECTRONIC CONTROLLER
2
3
5
4
65.9
4.56
7.54
11.34
3 3
3.93.3 3.2 3.1
7
8
10
9
Out
put
tem
per
atur
e (°
C)
Variation output temperature
11
12
0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5
4.3
3.53
Minimum water content in the plant lt/kW
11.510.5
3.52 3.52 3.52 3.52 3.523,68 3.52
Not acceptable minimum starting time compressor
Step-wise regulation
Quickmind
5 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
Control unit with LCD display (optional) - Remote keyboardAs an alternative to the standard keyboard, the NECS has a W3000 Compact operator panel with liquid crystal display. (LCD)
This keyboard employs a user interface with 3 European lan-guages that may be selected by the user, two of which are pre-set, and a further language of choice which may be French, German, Spanish, Swedish or Russian (to be specifi ed on or-
der). This allows the control unit interface to be chosen to suit the country of destination or, thanks to English, to be completely independent for all geographical areas.This same type of operator panel is also available as a remote keyboard, to be connected to the unit by means of a serial con-nection up to a maximum distance of 200 metres without power supply (in this case power is supplied by the unit), or a maxi-mum of 500 metres with dedicated local power supply.
NoteThe remote keyboard may be connected to the unit without re-placing the W3000 Base operator panel originally provided on the unit. In this case the interface fi tted locally on the unit is ex-cluded, and access to the programming menus and the display of the machine status is present only the additional keyboard at remote level.
Instead, when the W3000 Base operator panel is replaced with the W3000 Compact panel, control of the unit is possible at both local and remote level. In this case the remote keyboard faithfully reproduces what is shown on the control unit on board the machine, further facilitating all the operations of confi guring and controlling the unit.
0,250,250,25 0,25 0,250,250,25kWSingol power input NOISE LEVELS (2)
Total sound power dB(A) 85 85 85 86 86 86 875554 535353dB(A)Total sound pressure 5454
DIMENSIONS AND WEIGHTS (3)
Length Width Height Weight
mm.mm.mm.kg.
219511201420625
219511201420625
219511201420665
2195 1120 1420 765
2745 1120 1420 920
274511201420990
3245112016201135
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C 2 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 3 Standard configuration - Not available
Heat exchanger water flow m³/h 24,9 27,3Heat exchanger pressure drop kPa 21,7 25,9
NECS
COMPRESSORS Number Number of capacity Number of circuits N°.
N°.N°. 2 2
2 22 2
Type of regulation STEPS STEPS
1313kg.Oil charge 22,925,1kg.Refrigerant charge
R410AR410AType of refrigerant % 50 50Minimum capacity steps
FANS Number Air flow
N°.m³/s
10 1012,8 12,8
0,250,25kWSingol power input NOISE LEVELS (2)
Total sound power dB(A) 87 875555dB(A)Total sound pressure
DIMENSIONS AND WEIGHTS (3)
Length Width Height Weight
mm.mm.mm.kg.
3245112016201180
3245112016201155
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C 2 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 3 Standard configuration - Not available
0,250,250,25 0,25 0,250,250,25kWSingol power input NOISE LEVELS (2)
Total sound power dB(A) 85 86 86 87 87 87 875555 545453dB(A)Total sound pressure 5555
DIMENSIONS AND WEIGHTS (3)
Length Width Height Weight
mm.mm.mm.kg.
219511201420650
274511201420700
274511201420750
3245 1120 1620 915
3245 1120 1620 1050
3245112016201075
3245112016201115
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C 2 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 3 Standard configuration - Not available
0,250,250,25 0,25 0,160,160,16kWSingol power input NOISE LEVELS (2)
Total sound power dB(A) 80 80 81 83 83 83 845251 494848dB(A)Total sound pressure 5151
DIMENSIONS AND WEIGHTS (3)
Length Width Height Weight
mm.mm.mm.kg.
219511201420625
219511201420650
274511201420715
2745 1120 1620 840
2745 1120 1620 965
2745112016201025
3245112016201135
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C 2 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 3 Standard configuration - Not available
Heat exchanger water flow m³/h 23,9 26,0Heat exchanger pressure drop kPa 19,9 23,5
NECS
COMPRESSORS Number Number of capacity Number of circuits N°.
N°.N°. 2 2
2 22 2
Type of regulation STEPS STEPS
1313kg.Oil charge 22,925,1kg.Refrigerant charge
R410AR410AType of refrigerant % 50 50Minimum capacity steps
FANS Number Air flow
N°.m³/s
10 1010,7 10,7
0,250,25kWSingol power input NOISE LEVELS (2)
Total sound power dB(A) 84 845252dB(A)Total sound pressure
DIMENSIONS AND WEIGHTS (3)
Length Width Height Weight
mm.mm.mm.kg.
3245112016201180
3245112016201155
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C 2 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 3 Standard configuration - Not available
0,250,250,25 0,25 0,160,160,16kWSingol power input NOISE LEVELS (2)
Total sound power dB(A) 77 78 78 81 81 81 825049 464645dB(A)Total sound pressure 4949
DIMENSIONS AND WEIGHTS (3)
Length Width Height Weight
mm.mm.mm.kg.
219511001420650
274511001420700
274511001420750
3245 1100 1620 915
3245 1100 1620 1050
3245110016201075
3245110016201115
1 Plant (side) cooling exchanger water (in/out) 12/7 °C Source (side) heat exchanger air (in) 35 °C 2 Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level 3 Standard configuration - Not available
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Ta [°C] - Air temperature Tev [°C] - Plant (side) cooling exchanger output water temperature
Pat [kW] - Total power input Qev [m³/h] - Plant (side) heat exchanger water flow Dpev [kPa] - Plant (side) cooling exchanger pressure drop
Pf [kW] - Cooling capacity
'-' Conditions outside the operating range Waterflow and pressure drop on heat exchangers calculated with 5°C of delta TNOTE: Data on grey background: unit switched to non-silenced operation
Tc OUT [°C]: Heat exchanger temperature on source side (out)Tev OUT [°C]: Cold exchanger temperature on user side (out)
Limits to exchanger water temperature are valid within the minimum - maximum water flow range indicated in the Hydraulic.Data section.
ETHYLENE GLYCOL MIXTURE
Ethylene glycol and water mixtures, used as a heat-conveying fluid, cause a variation in unit performance. For correct data, use the factors indicated in the following table.
Performances are based on clean condition of tubes (fouling factor =1). For different fouling values, performance should be adjusted using the correction factors shown in the following table.
f1 - f2 - f3: capacity correction factorsfk1 - fk2 - fk3: compressor power input correction factorsfx1 - fx2 - fx3: total power input correction factors
20
30
40
50
0201001-
Tev OUT [°C]
Tc O
UT
[°C
]
46
-8 15-2
5. OPERATING RANGE
20 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
6. HYDRAULICDATA
SIZEEvaporator
K Q min m3/h
Q max m3/h
W.c. min m3
0202 75.0 7,5 15,3 0,13
0252 76,3 7,9 16,8 0,15
0302 76,5 8,1 21,9 0,19
0352 77,1 9,2 25.0 0,22
0412 46,1 12,8 27,9 0,24
0452 46,1 12,8 32,3 0,28
0512 33,1 13,5 36,4 0,32
0552 34,9 15,5 41,6 0,36
0612 34,8 16,9 45,6 0,40
Water flow in the heat exchangers is given by:Q=Px0,86/DtQ: water flow (m3/h)Dt: difference between inlet and outlet water temp. (°C)P: heat exchanger capacity (kW)
Pressure drop is given by:Dp= K x Q2/1000Q: water flow (m3/h)Dp: pressure drop (kPa)K: unit size ratio
Q min: minimum water flow admitted to the heat exchanger.Q max: maximum water flow admitted to the heat exchanger.W.c. min: minimum water content admitted in the plant, using
traditional control logic.
6.1 Waterflowandpressuredrop
21 NECS_0202T_0612T_200912_GB
NECS
HFCR410A
The units can be supplied with a hydronic group. This houses all the main hydraulic components, thereby optimising hydrau-lic and electric installation space, time and cost. The innovative QuickMind control tted to the units in the NECS system, has been designed to work on systems with a low water content, offering highly professional alternatives to the installation of systems featuring storage units.
Available con gurations:
CENTRIFUGAL PUMPHydronic kit with one 2-pole low-head pump Hydronic kit with one 2-pole high-head pump Hydronic kit with two 2-pole low-head pumps Hydronic kit with two 2-pole high-head pumps
2-pole low head pumpCentrifugal electric pumps with hydraulic parts in AISI 304/316, insulated pump impeller and differential pressure switch on the evaporator. Pump shut-off valves tted on both delivery and suction of a check valve for each pump installed. Hydronic kit equipped with safety valve, water pressure gauge and air vents.
2-pole high-head pump All versions of the hydronic unit can be supplied with a high-head pump. In these cases, the pump features a two-pole mo-tor even in the low noise versions.
Second pumpA second stand-by pump for high or low pressures is available on request. The pumps are automatically exchanged on the basis of a rotation programme and the stand-by pump cuts in automatically if the primary pump fails.
GENERAL CHARACTERISTICS
Water connectionsIn units without a pump, in the standard version, the water inlet and outlet connections in both the evaporator and the desuper-heater are always ush with the machine.
Water-side mechanical fi lter (optional)Y- lter designed and built to capture the impurities in the hy-draulic circuit. It is tted with a 0.9 mm stainless steel mesh cartridge which can be replaced without removing the valve body from the piping.
Additional components The supply does not include the following accessories though these are recommended to ensure correct system operation:- MA Pressure gauges upline and downline from the unit - GF Flexible joints on piping - RI On-off valves- T Outlet control thermometer
7. HYDRONIC GROUPS (Optional)
CONFIGURATION OF HYDRONIC UNIT WITH 1/2 ORTHOGONAL PUMPS
The hydronic unit comprises: - EV User side exchanger - PE Centrifugal pump - Pd Differential pressure switch - SC Discharge valve - S1 Exchanger input water temperature probe - S2 Exchanger outlet water temperature probe - SF Air vent - RH Check valves
CIRCUITS WITH 2 OPTIONAL PUMPS
SYSTEM RETURN LINE
SYSTEM DELIVERY LINE
22 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
2-POLE LOW HEAD- 1/2 PUMPS
(1) Values refer to rated operating conditionsPf Cooling capacity of unitQ Evaporator water ow rate F.L.I. Power absorbed by pump F.L.A. Current absorbed by pumpSA Starting current by pump KP1 Coef cients for calculating pressure drops Unit with hydronic unit without network lterDpu Total pressure drop of hydronic groupHu Working head
PUMP CHARACTERISTICS
Pf (1) Q (1) Pump F.L.I. F.L.A. SAKP1
Dpu Hu
[kW] [m3/h] Reference [kW] [A] [A] [kPa] [kPa]
0202T 53.0 9.13 D 1,1 2,5 13,7 132,3 11,0 117
0252T 58.1 10.0 D 1,1 2,5 13,7 132,3 13,2 111
0302T 76.0 13.1 D 1,1 2,5 13,7 132,3 22,6 85
0352T 86.8 14.9 D 1,1 2,5 13,7 132,3 29,5 119
0412T 96.9 16.7 D 1,1 2,5 13,7 66,4 18,4 119
0452T 112 19.3 D 1,1 2,5 13,7 66,4 24,8 94
0512T 127 21.8 C 1,5 3,2 20,6 53,4 25,3 115
0552T 145 24.9 B 1,5 3,4 22,2 55,4 34,4 100
0612T 159 27.3 A 1,5 3,5 24,3 55,4 41,2 95
20
40
60
80
100
120
140
160
180
200
220
240
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45
Q [m3/h]
Hp
[kPa
]
ABCD
23 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
2-POLE HIGH HEAD - 1/2 PUMPS
PUMP CHARACTERISTICS
Pf (1) Q (1) Pump F.L.I. F.L.A. SAKP
Dpu Hu
[kW] [m3/h] Reference [kW] [A] [A] [kPa] [kPa]
0202T 53.0 9.13 D 1,5 3,2 20,6 132,3 11 197
0252T 58.1 10.0 D 1,5 3,2 20,6 132,3 13 191
0302T 76.0 13.1 C 2,2 4,8 37,3 132,3 23 201
0352T 86.8 14.9 C 2,2 4,8 37,3 132,3 29 190
0412T 96.9 16.7 C 2,2 4,8 37,3 66,4 18 197
0452T 112 19.3 B 3 5,6 57,6 66,4 25 205
0512T 127 21.8 B 3 5,6 57,6 53,4 25 198
0552T 145 24.9 A 3 6,3 51,6 55,4 34 234
0612T 159 27.3 A 3 6,3 51,6 55,4 41 216
(1) Values refer to rated operating conditionsPf Cooling capacity of unit Q Evaporator water ow rateF.L.I. Power absorbed by pump F.L.A. Current absorbed by pump SA Starting current by pumpKP Coef cients for calculating pressure drops Unit with hydronic unit without network lterDpu Total pressure drop of hydronic group Hu Working head
40
60
80
100
120
140
160
180
200
220
240
260
280
300
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45
Q [m3/h]
Hp
[kPa
] A
B
C
D
24 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
Maximum values
Size nCompressor Fan motors (1) Total unit (1) (2)
F.L.I. Full load power input at max admissible conditionF.L.A. Full load current at max admissible conditionL.R.A. Locked rotor amperes for single compressorS.A. Starting current
(1) �alues calculated referring to t�e �ersion wit� t�e maxi��alues calculated referring to t�e �ersion wit� t�e maxi�mum number of fans working at t�e max absorbed current
(2) Safety �alues to be considered w�en cabling t�e unit for power supply and line�protections
Power supply: 400/3/50�oltage tolerance: 10%Maximum �oltage unbalance: 3%
8. ELECTRICAL DATA
25 NECS_0202T_0612T_200912_GB
NECS
HFC R410A
BNECS9. FULL LOAD SOUND LEVEL
SIZE Octave band [Hz] 20001000 500 250 125 63 80004000
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certified units; in compliance with ISO 3744 for non-certified units Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
Plant (side) cooling exchanger water (in/out) 12/7 °CSource (side) heat exchanger air (in) 35 °C Average sound pressure level, at 10 (m.) distance, unit in a free field on a reflective surface; non-binding value obtained from the sound power level
REMARKS:For installation purposes, please refer to the documentation sent after the pur-chase-contract.This technical data should be considered as indicative.
CLIMAVENETA may modify them at any moment.
Type of connectors 0202 T 0252 T 0302 T 0352 T 0412 T 0512 T 0552 T 0612 TUNI ISO 7/1-R 2 2 2 2 2 1/2 2 1/2 2 1/2 2 1/2
Pipe threads where pressure-tight joints are not made on the threads - Designation, dimensions and tolerances.
Used terminology: G: Pipe threads where pressure-tight joints are not made on
the threadsA: Close tolerance class for external pipe threads where pres-
sure-tight joints are not made on the threadsB: Wider tolerance class for external pipe threads where pres-
sure-tight joints are not made on the threads
Internal threads: G letter followed by thread mark (only toler-ance class)
External threads: G letter followed by thread mark and by A let-ter for A class external threads or by B letter for B class external threads.
UNI ISO 7/1
Pipe threads where pressure-tight joints are made on the threads - Designation, dimensions and tolerances.
Used terminology: Rp: Internal cylindrical threads where pressure-tight joints are
made on the threadsRc: Internal conical threads where pressure-tight joints are
made on the threadsR: External conical threads where pressure-tight joints are
made on the threads
Internal cylindrical threads: R letter followed by p letterInternal conical threads: R letter followed by c letterExternal conical threads: R letter
Designation Description
UNI ISO 7/1 - Rp 1 1/2Internal cylindrical threads where pressure-tight joints are made on the threads, defined by stand-ard UNI ISO 7/1Conventional ø 1 1/2”
UNI ISO 7/1 - Rp 2 1/2Internal cylindrical threads where pressure-tight joints are made on the threads, defined by stand-ard UNI ISO 7/1Conventional ø 2 1/2”
UNI ISO 7/1 - Rp 3Internal cylindrical threads where pressure-tight joints are made on the threads, defined by stand-ard UNI ISO 7/1Conventional ø 3”
UNI ISO 7/1 - R 3External conical threads where pressure-tight joints are made on the threads, defined by standard UNI ISO 7/1 Conventional ø 3”
UNI ISO 228/1 - G 4 B
Internal cylindrical threads where pressure-tight joints are not made on the threads, defined by standard UNI ISO 228/1Tolerance class B for external threadConventional ø 4”
DN 80 PN 16 Flange Nominal Diameter: 80 mm th.Nominal Pressure: 16 bar
Notes:
Conventional diameter value [in inches] identifies short thread designation, based upon the relative standard. All relative values are defined by standards.As example, here below some values: